Agree with this accounting.

There is limited, but definitely not zero, demand for this kind of thing. Towards the end of the project's lifetime they actually set up a mobile app, which is probably the last piece making it viable.

Whether it's viable as a business I'm not convinced at all, but as a protocol for casual p2p commerce it may well be, now we have a mature Lightning network (though it will emphatically only get used for niches here and there, not like it's going to replace Amazon et al.).